Influence of isothermal quenching of LAMC CrMnSi cast steel on impact toughness①
来源期刊：中南大学学报(英文版)2005年第1期
论文作者：金宝士 黄志求 沈大东
文章页码：35 - 38
Key words：LAMC CrMnSi cast steel; bainite-austenite microstructure; impact toughness; hardness
Abstract: The influence of isothermal quenching process of low-alloy and medium carbon (LAMC) CrMnSi cast steel on the impact toughness was investigated. The microstructure and mechanical property of LAMC CrMnSi cast steel were analyzed by the laser optical modulator, the scanning electron microscopy, the energy dispersive spectrometer, the hardness and impact tests. The experimental results show that the dual phases of bainite and residual austenite can be obtained by the severity isothermal quenching, the fractographies of specimens change from quasicleavage to dimple at 310℃for 60 min, the impact toughness for specimens at the room temperature isothermally achieves 130 J/cm2, meantime and its hardness is more than 45(HRC).
